Computherm Q8RF(TX), Operating Instructions Manual

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If higher comfort is needed, the switching sensitivity should be set so that it
provides a steadier room temperature. On the other hand, please also take
into account that the boiler should not switch on and off multiple times in an
hour's time except at low outside temperatures (e.g. -10°C), since the frequent
on and off switches of the boiler reduce its efficiency and hence increases the
gas consumption. We recommend using the ±0.1°C switching sensitivity for
heating systems with high thermal inertia (e.g. underfloor heating), the ±0.2°C
(factory default setting) and ±0.3°C switching sensitivity for heating systems
with low thermal inertia (e.g. flat panel radiators).
To change the switching sensitivity, first press the “
SET ” button to go to
the main screen. Then press the “ DAY ” and “ COPY ” buttons one after the
other. Following this, select the desired switching sensitivity using the large
and buttons. The notices
„ ”
,
„ ”
and
„ ”
indicate ±0.1°C,
±0.2°C and ±0.3°C, respectively. Finally, confirm the setting by pressing the
“ SET ” button (if no buttons are pressed for at least 15 seconds, the setting is
automatically confirmed). After this confirmation, the device goes back to the
main screen.
2.5 Activation of the pump protection function
Under the factory default settings, the pump protection function is inactive. In
order to activate or deactivate it, first press the “
SET
” button to go to the main
screen. Then press the “ DAY ” and “ PROG ” buttons one after the other. Following
this, activate or deactivate this function using the large and buttons.
The notices
„ ”
and
„ ”
indicate activated and deactivated state,
respectively. Finally, confirm the setting by pressing the “
SET
” button (if no buttons
are pressed for at least 15 seconds, the setting is automatically confirmed). After
this confirmation, the device goes back to the main screen.
To prevent the pump from sticking, the activated pump protection function
switches on the boiler for a one minute period at 12:00 p.m. every day outside
the heating season. (The pump protection function can accomplish its task only
if the boiler is in working order in the summer, too. It is reasonable to set a low
temperature level, e.g. +10°C, on the thermostat for this period, to prevent the
boiler from unnecessary start-ups when the weather turns cold temporarily).
2.6 Calibrating the thermometer of the thermostat
There is a possibility to calibrate the thermometer of the thermostat (to correct
the measured temperature). In order to do this, first press the “ SET ” button to
go to the main screen. Then press the “ DAY ” and “ HOLD ” buttons one after the
other. After this, the notice
„ ”
appears in place of the time characters, and
the correction value appears in place of the measured temperature ( °C by
default). Following this, set the desired correction value using the large
and buttons between -3.0°C and +3.0°C, in 0.1°C increments. Finally,
confirm the setting by pressing the “ SET ” button (if no buttons are pressed
for at least 15 seconds, the setting is automatically confirmed). After this
confirmation, the device goes back to the main screen. The correction of the
measured temperature takes effect a couple of seconds after the confirmation.
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